Abstract
The Medical Officer's Journal of HMAS Sydney was a record kept by the ship's surgeon, Leonard Darby, of the conditions on the ship and the health, diseases, injuries and treatment of the sailors under his care. Records of anaesthesia and surgery indicate chloroform was mostly administered, as was ether occasionally. There was some use of intravenous and subcutaneous fluids for resuscitation. The journal also provides an eyewitness account of the Sydney–Emden battle on 9 November 1914 which occurred off the Cocos (Keeling) Islands and was a famous first victory for the young Australian Navy, making headlines around the world. The treatment of the many injured, mostly Germans, is described with the two Australian surgeons and the surviving German surgeon working together.